DR. CARL LEOPOLD AT “ THE SHACK” Baraboo, Wisconsin By Buddy Huffaker and Steve Swenson September 11, 2003 MR. HUFFAKER: This is oral history about Aldo Carl Leopold. September 11, 2003. At the Leopold Shack and Farm. DR. LEOPOLD: Why...

This is a plan to prevent zebra mussels and other aquatic nuisance species from spreading westward. This document includes background on the issue, including the current and potential impacts, ecological, economic and otherwise, the spread of these...

In 1869, John Wesley Powell led a small party down the Green and Colorado Rivers in a bold attempt to explore the Grand Canyon for the first time. After their monumental expedition, they told of raging rapids, constant danger, and breathtaking...